Roberto Alvarado Jr., the leading rider at Delaware Park, will be out of action for approximately a week to ten days with a knee bruise.
The 30-year-old native of Puerto Rico sustained the injury after his mount Steal the Claim broke down at the top of the stretch in the first race on June 5.
Alvarado has a four-win lead in the jockey standings over last year's leader, recording-setting Ramon Dominguez. Through June 5, Alvarado's record is 35 wins, 20 seconds, and 22 thirds from 150 mounts.
"He is sore and banged up and he has a bruised knee," said his agent Ed Fair. "He is going to be out of action for about a week to ten days."
Steal the Claim, a 4-year-old Kentucky-bred daughter of Gold Fever trained by Scott Lake, was euthanized shortly after the incident.